Mington



Apr. 24, 1923.

II. F. WOODROW WORKHOLDER Filed Sept. 50, 1918 2 Sheets-Sheet 1 W2 Amy/m M /4/ m m w T A A ri24, 1923. 1,452,949

l. F. WOODROW WORKHOLDER Filed Sept. 30, 1918 2 Sheets-Sheet 2 INVEN'I 'OR [4 mm ATTORNEY Patented Apr. 24, 1923.

UNITED STATES PATENT OFFICE.

IRVIN'F. WOODROW, OF WEST PHILADELPHIA, PENNSYLVANIA, ASSIGNOR, BY MESNE ASSIGNMENTS, TO STANDARD. STEEL AND BEARINGS INCORPORATED, OF WIL- MINGTON, DELAWARE, A CORPORATION OF DELAWARE.

WORKHOLDER.

Application filed September 30, 1918. Serial No. 256,316.

[0 0U 10 71.0712 it may concern Be it known that I, IRvIN F. l i oonnow, a citizen of the United States, residing at est Philadelphia, county of Philadelphia. State of Pennsylvania, have invented a certain new and'useful Improven'lent in lVorkholders, of which the following is such a clear and exact description as to enable any one skilled in the art to which it appertains to make and use the same.

My invention relates to work holders or chucks and more particularly to bore grinding pockets for use in holding the cone of a roller or ball bearing while the bore of same is being ground. It has for its object the provision of a simple and efficient means for holding the work to be ground in such a way that the work is automatically centered when placed in the pocket.

To these ends. and also to improve generally upon the devices of the character indicated, my invention consists in the following matters hereinafter described and claimed.

In the accompanying drawings:

Fig. 1 is a longitudinal section of my work holder showing a piece of work in position;

Fig. 2 is an end elevation of the same;

Fig. 3 is a similar view to Fig. 1 showing a modification thereof.

Although I have illustrated and more particularly described my invention as embodied in a chuck for holding the cone of a roller hearing, it will be understood that it is by no means restricted to such application.

In Fig. 1 is illustrated a chuck embodying my invention as adapted for use in connection with the cone of a taper roller bearing, designated generally as 1, which is adapted to be carried by the rotating spindle of a grinding machine and attached thereto in ing surface 8, by means of which the work to be ground, is automatically centered. Between the inner end of this sleeve and the shoulder 4. there is interposed a spring 9 tending to force the sleeve 7 outwardly. I

The block 2 is provided with a screw threaded cap 10 which covers the face of the block and engages with the thread 11 on the exterior surface of the block. Portions of this cap are cut away to provide a means of inserting the work into the sleeve 7. As a result of these cut-out portions. a strip 12, which is approximately the width of the sleeve 7 is left. This strip 12 is provided with an opening 13, the diameter of which is slightly greater than that of the grinding wheel to be used. The outer surface of the abutment member 6 is provided with a helical oil groove 14. IV represents the work to be operated on and. is shown in position to be ground.

To remove the work from the chuck the cap ,10 is rotated in such a way as to move the same outwardly. After turning the cap su'liiciently, the sleeve 7 is pressed inwardly against the action of the spring 9 until sufficient clearance is obtained to 'slip the work out of the pocket. lVhen a new piece of work is inserted, it auton'latically centers itself due to the tapered surface 8 which engages the exterior of the work.

IVhen placed in the chuck the work first engages the tapered surface 8. The spring 9 forces the sleeve 7 outwardly, and as the work is prevented from. moving because of engagement with the portion 12 of the cap, the two tapered surfaces of the sleeve and the work respectively, bring about a centering of the work. A tightening of the shell 10 brings the work up against the end of the abutment member and clamps it in proper position to be ground.

In Fig. 8 is illustrated a chuck embodying the invention as adapted for use with the cone of a. ball-bearing. In this modification a tapered. surface 8' is provided on the outer end of the sleeve which is slightly different in configuration from the surface 8 but which functions sil'nilarly. The work IV is inserted in the same way and is centered by means of the tapered surface 8.

In this way a quick, simple and efficient work holding device is produced, one which can be manipulated by unskilled labor and yet produce accurate results due to the automatic centering of the work.

I claim as my invention:

5 f A work holder comprising a body portion having a socket, an abutment member in said socket, means movably mounted on said abutment member to locate a piece of work coaxial therewith, and a cap movable longitudinally of said body portion to clamp the work against said abutment member, a portion of said cap being cut out to provide an aperture through which the work may be inserted and removed.

IRVIN FLINN \VOODROW. 

